I've actually thought about doing something, just myself, for Queensland.
I mean, you have the issue of well established identities in most Aussie cities. If you're not thinking of the Melbourne Demons, then you have A-League, cricket, and rugby sides to contend with. Whether you're avoiding nicknames or contriving colours, the restrictions can be a bit too rigid.
WA and SA have footy leagues. New South Wales has the NRL. I reckon you could string up an okay Brisbane-based footy hypothetical. Say the league begins in 1900 via some south-of-the-Barassi blokes moving over.
Paddington, Newmarket, Albion... they're a blank canvas. Maybe
Hand,
Everton Lions or
lmach have some experience with clubs or something there... but most of us could do anything and any resemblance to actual clubs would be coincidental.
Plus you'd have places like the Goldy, the Sunshine Coast, Bundaberg, Rockhampton, Townsville, and Cairns. People like mocking up expansion clubs and some of those places could have franchises.
Plus it's still directly Australian, so it doesn't feel foreign and forced.
Sorry for hijacking...